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  • PAT Advanced 1029 Median(25)2022-08-28 23:03:24

    题目描述: Given an increasing sequence S of N integers, the median is the number at the middle position. For example, the median of S1 = { 11, 12, 13, 14 } is 12, and the median of S2 = { 9, 10, 15, 16, 17 } is 15. The median of two sequences is defined to be

  • 关于pthon中-字符串处理时-TypeError: string indices must be integers-的原因分析及处理2022-08-17 23:33:11

    今天笔者将一串如下样式的json格式的字符串,如下赋值给一个变量时 { "Images": [ { "Architecture": "x86_64", "CreationDate": "2022-08-16T10:51:34.000Z", "ImageId": "ami-035c4

  • LeetCode 2094. Finding 3-Digit Even Numbers2022-08-08 03:00:27

    原题链接在这里:https://leetcode.com/problems/finding-3-digit-even-numbers/ 题目: You are given an integer array digits, where each element is a digit. The array may contain duplicates. You need to find all the unique integers that follow the given requirem

  • ArrayList面向对象(功能实现)2022-07-23 21:02:08

    主要是思路 ArrayList底层其实也就是个数组,所以我们需要定义一个(integers[]),数组的话就肯定会有一个长度(initialCapacity初始容量)(这俩个是肯定能想到的),有长度的话也并不行,因为我们的数组不一定存储多少个数据,所以需要有个变量记录个数(size)。 构造函数可以有无参和有参,因

  • 线段树之区间更新Interesting Array2022-07-18 22:33:40

    Description We'll call an array of n non-negative integers a[1], a[2], ..., a[n]interesting, if it meets m constraints. The i-th of the m constraints consists of three integers li, ri, qi (1 ≤ li ≤ ri ≤ n) meaning that value  shoul

  • 【Java】查找 List/String字符串 中是否包含指定的 元素/字串 contains方法实现2022-07-13 21:03:30

      /** * 查找list中是否有指定元素 */ @Test public void findListEl() { List<Integer> integers = Arrays.asList(3, 5, 2, 7, 8, 1, 9); Integer kw1 = 9; Integer kw2 = 6; System.out.println(integers.contains(kw

  • HDU 1796 How many integers can you find2022-06-20 10:06:26

    题目链接 测试提交 一、容斥典型问题 求在给定区间内,能被给定集合至少一个数整除的数个数 二、解题思路 将给出的\(n\)个整除的数进行二进制枚举(\(2^n\)),计算\(a_i\)所能组成的各种集合(这里将集合中\(a_i\)的最小公倍数作为除数)在区间中满足的数的个数,然后利用容斥原理实现加减

  • POJ-3468 A Simple Problem with Integers2022-05-19 19:32:24

    A Simple Problem with Integers 线段树 || 分块 模板题 线段树: #include<cstdio> #include<algorithm> using namespace std; typedef long long ll; const int maxn = 2e5 + 10; ll num[maxn]; struct node { int l; int r; ll val; ll lazy; }tree[maxn * 4]; void

  • leetcode https://leetcode.cn/problems/count-integers-in-intervals/ 线段树解决2022-05-15 17:00:36

    leetccode count-integers-in-intervals 线段树解决: class CountIntervals { Seg root; public CountIntervals() { root = new Seg(1, 1000000000); } public void add(int left, int right) { root.add(left, right); } public in

  • Gridded CSV to Raster using Geotools(使用Geotools将栅格CSV转换为栅格)2022-05-14 16:32:38

    https://gis.stackexchange.com/questions/246080/gridded-csv-to-raster-using-geotools 问题: Could someone please point me in the right direction for creating a geotiff DEM with Geotools that from gridded X,Y,Z coordinates. 有人能告诉我用Geotools创建geotiff DEM的

  • 周报4.10-4.172022-04-18 00:03:41

    最近在做认识实习的期末小结,里面刚好有关于构造的题目。 构造这方面的内容我一直觉得很抽象,之前没接触过的时候(其实是我不知道自己用到了构造)觉得是类似于数学论证里的“不妨设。。。”,没人说理。不过我做了几道题发现还是比我想象中的有头有尾。 有些题目没什么难度,基本就是稍加

  • Leetcode46/47之回溯中的排列问题2022-04-07 15:35:58

    排列问题 和子集问题以及组合问题不同的是每次回溯都要从头来 这样就要对当前元素筛选了,如果之前已经排列过了就要跳过这个元素 最常用的筛选方法就是boolean数组或者hashset Leetcode46-全排列 给定一个不含重复数字的数组 nums ,返回其 所有可能的全排列 。你可以 按任意顺序

  • Leetcode216/39/40/77之回溯解决经典组合问题2022-04-07 12:00:49

    Leetcode216-组合总和三 找出所有相加之和为 n 的 k 个数的组合,且满足下列条件: 只使用数字1到9 每个数字 最多使用一次 返回 所有可能的有效组合的列表 。该列表不能包含相同的组合两次,组合可以以任何顺序返回 输入: k = 3, n = 7 输出: [[1,2,4]] ArrayList<List<Integer>> r

  • C. Great Sequence(Div. 2)2022-02-28 21:07:17

    题目: A sequence of positive integers is called great for a positive integer x, if we can split it into pairs in such a way that in each pair the first number multiplied by x is equal to the second number. More formally, a sequence a of size n is great fo

  • 代码测试工具2022-02-22 13:59:01

    Hypothesis 初识 Hypothesis是一个Python库,用于创建单元测试,该单元测试编写起来更简单,运行时功能更强大,可以在您不需要的代码中查找极端情况。它稳定,强大且易于添加到任何现有测试套件中。 它的工作原理是让您编写断言每种情况都应该正确的测试,而不仅仅是您偶然想到的那些。

  • Sum is K(翻译)2022-02-06 15:02:00

    http://noi.openjudge.cn/english/15/ 描述 Given a sequence of N numbers. Find different numbers A and B in the sequence so that the sum of A and B equals to K. 输入 First line: two positive integers N (N <= 1000) and K (K <= 1000000). Second line: N posi

  • Children‘s Apples(http://noi.openjudge.cn/english/14/)2022-02-02 16:34:05

    原文: 描述 There are N children. Each child has a positive number, and the numbers are different from each other. Given the sum of all numbers of children. Find a possible assignment. 输入 Two positive integers N (N <= 10) and the sum (sum <= 10000). 输出 O

  • 第二章:状态变量和整数 State Variables & Integers2022-01-30 22:35:24

    状态变量是被永久的保存在合约里,也就是说他们被写进了 以太坊 的 区块链 中,简单的理解就像是写入了一个数据库。 举个例子: contract Example { // 这个无符号整数将会永久的被保存在区块链中 uint myUnsignedInteger = 100; } 在上面这个合约中,定义 myUnsignedInteger

  • 《机器学习实战》CART回归树源码问题:TypeError: list indices must be integers or slices, not tuple2022-01-27 21:03:23

    书中代码1: def binSplitDataSet(dataSet, feature, value): mat0 = dataSet[nonzero(dataSet[:,feature] > value)[0],:][0] mat1 = dataSet[nonzero(dataSet[:,feature] <= value)[0],:][0] return mat0,mat1 改成: def binSplitDataSet(dataSet, feature, valu

  • 1.26翻译2022-01-26 20:31:33

    OpenJudge - 04:0/1 Knapsack 04:0/1 Knapsack 查看提交统计提问 总时间限制:  1000ms 内存限制:  65536kB 描述 Given the weights and values of N items, put a subset of items into a knapsack of capacity C to get the maximum total value in the knapsack. The tota

  • Sum is K2022-01-20 09:32:52

    描述: Given a sequence of N numbers. Find different numbers A and B in the sequence so that the sum of A and B equals to K. 输入: First line: two positive integers N (N <= 1000) and K (K <= 1000000). Second line: N positive integers (<= 1000000). 输出:

  • 翻译2022-01-17 22:00:19

    Sum is K  1000ms  65536K 描述: Given a sequence of N numbers. Find different numbers A and B in the sequence so that the sum of A and B equals to K. 输入: First line: two positive integers N (N <= 1000) and K (K <= 1000000).Second line: N positive inte

  • 英语翻译作业2022-01-17 19:06:28

    OpenJudge - 26:The Nearest Number 总时间限制: 1000ms 内存限制: 65536kB 描述 Given a sequence of N number and K. Find the nearest number X in the sequence that the absolute value of (X minus K) is minimum. 给出N个数和数字K。在这N个数中找到一个数X,使得(X-K)的绝

  • 【leetcode】227. Basic Calculator II2021-12-27 20:37:20

         Given a string s which represents an expression, evaluate this expression and return its value.  The integer division should truncate toward zero. You may assume that the given expression is always valid. All intermediate results will be in the ran

  • Java-TreeMap2021-12-03 01:31:06

    Java-TreeMap TreeMap会实现放入数据的自动排序,所以再放入自写类时,需要实现Comparator接口或者Comparable接口 package com.unicom.www; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.TreeSet; public class Tr

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